Inseparable Two Spin-Density Matrices Can Be Distilled to a Singlet Form
- 27 January 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (4) , 574-577
- https://doi.org/10.1103/physrevlett.78.574
Abstract
A quantum system is called inseparable if its density matrix cannot be written as a mixture of product states. In this Letter we apply the separability criterion, local filtering, and Bennett et al. distillation protocol [Phys. Rev. Lett. 76, 722 (1996)] to show that any inseparable system represents the entanglement which, however small, can be distilled to a singlet form.
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